Bhakti-rasāmṛta-sindhu .3.37
atha svara-bhedaḥ –
[atha svara-bhedah –]
visāda-vismayāmarṣa-harṣa-bhīty-ādi-sambhavam |
[visaada-vismayaamarsha-harsha-bheety-aadi-sambhavam |]
vaisvaryaṁ svara-bhedaḥ syād eṣa gadgadikādikṛt ||37||
[vaisvaryam svara-bhedah syaad esha gadgadikaadikrit ||37||]
Blended reading (Sanskrit + English inline)
atha svara-bhedaḥ –
visāda-vismayāmarṣa-harṣa-bhīty-ādi-sambhavam |
vaisvaryaṁ svara-bhedaḥ syād eṣa gadgadikādikṛt ||37||
Choking of the voice: Distortion of the voice is called svara-bheda. It arises from sorrow, astonishment, anger, joy and fear. It causes convulsions in speaking.
Purport
Faltering of the Voice
— A.C. Bhaktivedanta Swami Prabhupāda
Gauḍīya Ācāryas
Jīva Gosvāmī
Gauḍīya
Durgama-saṅgamanī
Commentary
Vaisvarya (distortion of the voice) and svara-bheda (broken voice) are synonyms. The use of synonyms is found in the other definitions as well.
My note
Source: vedabase.io